Dr. Michael O'Toole is a medical specialist in cardiac electrophysiology (heart rhythm). Dr. O'Toole's clinical interests include heart problems, hypertension (high blood pressure), and cardiac electrophysiological study. He is in-network for Aetna EPO, Blue Cross/Blue Shield, and Coventry, in addition to other insurance carriers. He is a graduate of Loyola University Chicago, Stritch School of Medicine. For his professional training, Dr. O'Toole completed a residency program at a hospital affiliated with the University of Chicago. His professional affiliations include Northwestern Medicine Central DuPage Hospital and DuPage Medical Group (DMG). His practice is open to new patients.

Dr. Matthew Nora's medical specialty is cardiac electrophysiology (heart rhythm). His areas of expertise include heart problems, hypertension (high blood pressure), and cardiac electrophysiological study. Dr. Nora is an in-network provider for Aetna EPO, Blue Cross/Blue Shield, and Coventry, in addition to other insurance carriers. He obtained his medical school training at Loyola University Chicago, Stritch School of Medicine and performed his residency at Mayo Clinic. He is professionally affiliated with Northwestern Medicine Central DuPage Hospital and DuPage Medical Group (DMG). Dr. Nora welcomes new patients.

Dr. Kenneth Weinberg works as an adult cardiologist and cardiac electrophysiologist. Patients gave Dr. Weinberg an average rating of 4.0 stars out of 5. His areas of expertise include cardiac electrophysiological study, pacemaker, and cardiac ablation. His professional affiliations include Northwestern Medicine Central DuPage Hospital and DuPage Medical Group (DMG). He is in-network for Aetna EPO, Blue Cross/Blue Shield, Coventry, and more. Dr. Weinberg is open to new patients. He graduated from Northwestern University, Feinberg School of Medicine. His medical residency was performed at McGaw Medical Center of Northwestern University.

Dr. Eugene Greenstein works as a cardiologist and cardiac electrophysiologist. Areas of expertise for Dr. Greenstein include cardiac electrophysiological study, atrial fibrillation, and cardiac ablation. He is professionally affiliated with Northwestern Medicine Central DuPage Hospital and DuPage Medical Group (DMG). He is an in-network provider for Aetna EPO, Blue Cross/Blue Shield, and Coventry, in addition to other insurance carriers. His practice is open to new patients. After attending the University of Michigan Medical School, Dr. Greenstein completed his residency training at McGaw Medical Center of Northwestern University.

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What is Cardiac Electrophysiology?

Cardiac electrophysiology, or simply electrophysiology, is a subspecialty of cardiology. Cardiac electrophysiologists are doctors who really feel the beat: they specialize in the rhythm of the heart and the way it uses electrical impulses to move.

Cardiac electrophysiologists diagnose problems with heartbeats, or arrhythmias. Arrhythmias can be present at birth or simply come with age. Other medical conditions can also affect the heart’s rhythm: for example, sleep disorders, diabetes, high blood pressure, and hardened arteries.

Cardiac electrophysiologists treat heart rhythm disorders with medication or surgical procedures. One such procedure is called an "ablation," which uses radio frequency waves to kill heart cells that may be misfiring. Cardiac electrophysiologists can also implant devices that control the rhythm of the heart, such as pacemakers or defibrillators.